Exclusive measurement of proton quasifree scattering and density dependence of the nucleon-nucleon interaction

K. Hatanaka, M. Kawabata, N. Matsuoka, Y. Mizuno, S. Morinobu, M. Nakamura, T. Noro, A. Okihana, K. Sagara, K. Takahisa, H. Takeda, K. Tamura, M. Tanaka, S. Toyama, H. Yamazaki, Y. Yuasa

    Research output: Contribution to journalArticlepeer-review

    36 Citations (Scopus)

    Abstract

    Differential cross sections and analyzing powers(Ay)have been measured for the proton knockout reaction from s1/2 orbits of three kinds of target nuclei at Ep=392meV.The Ay values are reduced from those of free proton-proton scattering and the reduction rate is found to depend on target. For the present setting, where the recoil momentum is almost zero, an averaged density seen through this reaction can be estimated and it reaches almost half of the saturation density in some cases. The reduction of Ayshows a monotonically decreasing function of the averaged density, which strongly suggests the existence of a nuclear medium effect on the nucleon-nucleon interaction.

    Original languageEnglish
    Pages (from-to)1014-1017
    Number of pages4
    JournalPhysical review letters
    Volume78
    Issue number6
    DOIs
    Publication statusPublished - 1997 Feb 10

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

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